4324093
Description
Mind Map by Edward Dogley, updated more than 1 year ago
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Created by Edward Dogley
over 8 years ago
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eletromagnetism
- magnetic field
- any ferrous object can
be magnetized or
demagnetized
- the space around the magnet is called the
magnet field. a compass placed in the
magnetic field it would align itself along
a line of force going toward the south
magnet
- any ferrous object can
be magnetized or
demagnetized
- electromagnetics
- an electromagnets is insulated wire
wrapped round an iron bar. when a
current pasts through the wire a
magnet field is created
- electromagnetics can be use for
scrapyard crane, circuit breaker,
electric bell and a relay
- an electromagnets is insulated wire
wrapped round an iron bar. when a
current pasts through the wire a
magnet field is created
- the motor
effect
- electric motor can be built using a coil
of wire that is free to rotate between
two opposite magnetic poles. When an
electric current flows through the coil,
the coil experiences a force and moves
- electric motor can be built using a coil
of wire that is free to rotate between
two opposite magnetic poles. When an
electric current flows through the coil,
the coil experiences a force and moves
- the generator
effect and a.c.
genertors
- An electric current is produced
when a magnet is moved into a coil
of wire in a circuit. The direction of
the current is reversed when the
magnet is moved out of the coil.
- a.c. generator Alternating voltage may be generated by
rotating a coil in the magnetic field or by rotating a
magnetic field
- An electric current is produced
when a magnet is moved into a coil
of wire in a circuit. The direction of
the current is reversed when the
magnet is moved out of the coil.
- transformer
- A transformer changes the potential difference of electricity. It
only works with alternating current
- A transformer changes the potential difference of electricity. It
only works with alternating current
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